Many of the best parts of the WGRE have been translated into Fifth Edition and either incorporated into the core rules or other supplements. Since the WGRE is a mechanics-heavy book, and the mechanics for magic have changed substantially between ArM4 and ArM5 (the Spell Guidelines are different, some of the Arts have changed scope, and the Ranges of spells work differently), most of the contents of WGRE are obsolete for Fifth Edition.

Until about 2005, the original Ars Magica FAQ site solicited reviews of Ars Magica products from the community. The online review submission form is no longer available, but please feel free to edit this page to add your own comments. A synopsis of the survey results for this book is: